Here in Europe, almost all new cars have DRL LED's. (LED's don't waist gas, they're very efficient). Like Canada, Sweden requires all cars to have their DRL on. Here in the Netherlands most drivers have their lights on (most are halogen bulbs, so they do waist gas--I'm running Xenon) to be seen by oncoming traffic, (motor)cyclists and pedestrians.
Use varies per country (Unlike here in the Netherlands, in Belgium almost no one uses them)--it's not required but encouraged.
But now with these new cars all having those LED's, I guess the whole of Europe is moving towards having DLR on at all times.